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Programmable display, safety management method of programmable display, and safety management program of programmable display

A security management and display technology, applied in program control, instruments, simulators, etc., to achieve the effect of security enhancement

Active Publication Date: 2020-03-13
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the password is a combination of character strings set by the user, so there is a possibility of guessing and stealing
In the case of stolen passwords, there is a possibility of stealing or tampering with programming data and parameters by accessing externally connected devices from the programmable display

Method used

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  • Programmable display, safety management method of programmable display, and safety management program of programmable display
  • Programmable display, safety management method of programmable display, and safety management program of programmable display
  • Programmable display, safety management method of programmable display, and safety management program of programmable display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0027] figure 1 It is a block diagram which shows the programmable display 100 which concerns on Embodiment 1. Such as figure 1 As shown, the programmable display 100 has: a device connection part 10, which is connected to the external connection device 1; a display part 20, which displays various information; an operation part 30, which performs various operations; a storage medium connection part 40, It is connected to the external storage medium 3 ; and the control unit 50 controls each part of the device connection unit 10 , the display unit 20 , the operation unit 30 and the storage medium connection unit 40 . Moreover, the programmable display 100 is equipped with the drawing-device connection part 60 connected to the drawing device 2 of the outside.

[0028] The externally connected device 1 includes a programmable logic controller (PLC: Programmable Logic Controller) as a control device for industrial equipment used at a production site. In Embodiment 1, access rest...

Embodiment approach 2

[0057] Figure 10 It is a block diagram showing the security control unit 155 according to the second embodiment. In Embodiment 2, since the configuration of the safety control unit 155 is different from Embodiment 1, the description will focus on the differences. The structure other than the safety control part 155 of the programmable display 200 which concerns on Embodiment 2 is the same as Embodiment 1. In Embodiment 2, the same code|symbol is attached|subjected to the same component as the programmable display 100 which concerns on Embodiment 1, and description is abbreviate|omitted or simplified.

[0058] Such as Figure 10 As shown, the security control unit 155 has the same as the first embodiment: a key generation unit 55a that generates a release key and an authentication key; a determination unit 55b that determines whether the release key and the authentication key are Correspondence determination; and the restriction setting unit 55c that sets and cancels the ac...

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Abstract

This programmable display is provided with: a device connection unit (10) that is to be connected to an external connection device (1); a storage medium connection unit (40) that is to be connected to an external storage medium (3); and a control unit (50) that controls the operations of the device connection unit (10) and the storage medium connection unit (40), sets an access limit on the external connection device (1), generates a release key for releasing the access limit on the external connection device (1) on the basis of unique management information stored in the storage medium (3), determines whether or not there is a match between the generated release key and a preset authentication key, and releases the access limit when there is a match between the release key and the authentication key.

Description

technical field [0001] The present invention relates to a programmable display for operating externally connected equipment used in a production site and displaying operation information, a safety management method for the programmable display, and a safety management program for the programmable display. Background technique [0002] The programmable display is connected to an externally connected device used at a production site, and displays information on the externally connected device and operates the externally connected device. Patent Document 1 describes the technology of security management of a programmable display. Patent Document 1 describes a method in which a MAC (Media Access Control) address file of a programmable display is stored in a storage medium, and the MAC address stored in the programmable display is compared with the MAC address stored in the storage medium. Perform security authentication. [0003] On the other hand, programming data and paramet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/44G05B19/042
CPCG05B19/042G06F21/44
Inventor 大小岛纱碧上野贵史
Owner MITSUBISHI ELECTRIC CORP